Buffer and cushion for planing-machines and other machines having reciprocating parts.



IVI. WALKER. BUFFER AND CUSHION FOB PLANING MACHINES AND OTHER MACHINES HAVING RECIPROCATING PARTS.

APPLICATION FILED FEB. 29, I9I6.

Patented Apr. 23, 1918.

ha f/z mom M. WALKER. BUFFER AND CUSHION FOR PLANXNG MACHINES AND OTHER MACHINES HAVING RECIPROCATING PARTS. APPLlCATlON FILED FEBJZQ. I916.

1 363 Um I Patented Apr. 23, 1918.

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BUFFER AND cusmom ma PLANING MACHINES AND OTHER MACHINES HAVING RECRPROGATING PARTS.

APPLICATION FILED FEB. 29, I916.

Patented Apr. 23,1918.

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- oovnnrnv LIMITED, or SALFORID, ENGLAND.

BUFFER AND CUSHION FOR raeao'ro.

[0 all whom it may concern. .3 y

Be it known that I, MALooLu WALKER, a British subject, residing at Langside, Glasgow, Scotland, have invented certain new.

and useful Improvements in Buflers and Cushions for Planing-Machines and other Machines Having Reciprocating Parts, of which the following is a. specification.

This invention relates to apparatus for cushioning the reciprocating table of planing machines or other reciprocating parts of machines. l

' It consists of a magneticbufi'er comprising one or more magnetic solenoids affixed to the side or framing of the machine with dogs or catches on the reciprocating table or part of the machine to engage-and move the core of the solenoid out-of its coil-at the end of each traverse. 1

The invention will'be fullydescribed with reference to the accompanying drawings in which it is shown applied to a planing ma chine.

Figure 1 is a side elevation.

Fig. 2 is an end elevation.

Fig. 3 is a detail of lever arm and roller H.

Fig, 4 is a side elevation showing a modified arrangement. 7

On one or both sides of the framing A on which the table B travels I mount. one or more electric solenoids C according to the size and weight of the reciprocating table.

Each solenoid is constructed with a soft metal core D mounted to slide horizontally, a magnetic coil E and a cast iron or other housing by which it is afiixed to the frame A.

Where two or more solenoids are employed on one side of the frame they are preferably mounted tandem, the cores D being mounted at intervals upon a non-magnetic rod or bar F extending lengthwise of the machine.

The rod or bar F may be made of delta Instead of being mounted horizontally asshown in Figs. 1 and 2 the solenoids may be mounted vertically as shown by Fig. 4 and the cores D be connected by bell crank levers d or other similar devices with a horirLAnIue-MAcnrnEs Ann ornnn MACHINES HAVING .RECIPROGATIING rears.

Specification of Letters Patent. Pwtgntedl Ap1323 191%,

Application filed February 1916. Serial No. 81,287. i v

zontal longitudinally sliding rod or bar by I which the cores are operated at the end of each traverse of the machine; j M

The traveling table B is fitted with ad justable dogs G of ordinary construction.

Therod F is fitted. with an arm or lever f or its equivalent with which one of the dogs Gr on the reciprocating table engages .at the end of each traverse and moves the rod. to the right rv left carrying the solenoids along with it. As shown the arm f is formed with a slot f with a roller H mounted within the slot or recess 7 the journals. of the roller traversing plates K with inclined ends. The dogs strike the rollerH and carry it and the. bar or rod F along other and each time act as a bufi'er to stop the traverse and in returning to accelerate the table in reverse, direction.

A switch S is mounted on the end of a spring-controlled rod N, the movement of which is effected by the levers M when oper- 'ated upon by the dogs G on the table. Normally the switch acts to reduce the current passing through the solenoids during the greater part of the traverse of the table when it is not required, but at the end of'the traverse one of the dogs engages and moves one of the levers M to switch on the full strength of the current before the dog 'G engages the proiecting roller or part of the arm 7 by which the rod F and solenoid cores D are moved. A handle m is connected to one of the levers M to operate the switch bv hand.

What I claim as my invention and desire to protect by Letters Patent is 2- 1. In a machine having a frame with a reciprocating table thereon, a magnetic solenoid mounted on the frame and provided with a core. means coiiperating with the core and by which the latter is moved against the attractive force of the magnetic solenoid, and means for automatically increasing the MALCOLM WALKER, orrnnesrnn, GLASGOW, SCOTLAND, ASSIGNOR To si/rrrnnivn 'the solenoid coils at the end of each traverse first in one direction and then in the current passing through the solenoid when the reciprocating table reaches the end of its movement. a I 2; Ina machinehaving a frame With a re- 5 ciprocating table thereon, a plurality of magnetic solenoids provided with cores movable to and fro therein, means attached to the cores by which they are operated at the .end, of each traverse of the reciprocating 10 table, 'and'means for preventing damage to the solenoids should the table travel too far in either direction.

3; Ida machine with a reciprocating ta- *bletbe combination with the fralningof a 1' magneticvsolenoidattached thereto, a. recip- "rocating' core therein, an arm connected theiewith andp rojections attachedto the re- 1 ciprocating table, to engage the arm-of the reciprocating core at the end of each trav- 2 "erse. I

" 4; In' a machine with a reciprocating table the combination therewith of plurality of magnetic solenoids attached to the framing,

reciprocating cores moving therein, rods connecting the several cores, and an arm Qprojecting therefrom with which the reciprocatingotable engages at theend of each 7 traverse to draw the cores out of the solenoids against the attractive force of the Q0 magnetic coils. 5 1 1 a machine with a reclprocatlng part,

the combination with the machine framing, the reciprocating table and projecting dogs mixed to the table of magnetic solenoids attached to the fran'iing, movement to and fro in the solenoids rods connecting the cores an arm attached thereto provided with a slot in the upper edge, plates at both sides of the arm, and a roller mounted upon the side plates and within the slot to beengaged the projecting dogs on the reciprocating"table.

6. In a machine with a reciprocating table the combination with the machine framing the reciprocating table and projecting dogs afiixed to the table of magnetic solenoids .mounted upon the tanning, solenoid cores MALCOLM \VALKER.

Witnesses HENRY MASON,

KATE FOTHERINGHAM.

i flimles et thlapatent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0."

cores capable of 

